Ozone impacts on vegetation in a nitrogen enriched and changing climate

TitleOzone impacts on vegetation in a nitrogen enriched and changing climate
Publication TypeJournal Article
Year of Publication2016
AuthorsMills G., Harmens H., Wagg S., Sharps K., Hayes F., Fowler D., Sutton M., Davies B.
JournalEnvironmental Pollution
Date PublishedJan
ISBN Number0269-7491
Accession NumberWOS:000368306500070

This paper provides a process-oriented perspective on the combined effects of ozone (O-3), climate change and/or nitrogen (N) on vegetation. Whereas increasing CO2 in controlled environments or opentop chambers often ameliorates effects of O-3 on leaf physiology, growth and C allocation, this is less likely in the field. Combined responses to elevated temperature and O-3 have rarely been studied even though some critical growth stages such as seed initiation are sensitive to both. Under O-3 exposure, many species have smaller roots, thereby enhancing drought sensitivity. Of the 68 species assessed for stomatal responses to ozone, 22.5% were unaffected, 33.5% had sluggish or increased opening and 44% stomatal closure. The beneficial effect of N on root development was lost at higher O-3 treatments whilst the effects of increasing O-3 on root biomass became more pronounced as N increased. Both responses to gradual changes in pollutants and climate and those under extreme weather events require further study. (C) 2015 Elsevier Ltd. All rights reserved.

Alternate JournalEnviron Pollut